1. What is the pre-order traversal of this tree:
     ,----
     |     (J)
     |    /   
     |  (A)   
     |    \
     |    (H)
     |   /   \
     | (Z)   (F)
     `----

  2. Provide a tree that has the following post-order traversal:

      7 3 5 1 2 3 4